Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 9 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/10/2019   09:40:38   (   0.36,-128.22) (  -0.54,-124.24)  454.34                80
 09/11/2019   22:02:34   (  -0.35,-128.16) (  -0.65,-129.54)  156.62                80
 09/12/2019   21:46:30   (  -0.35,-128.14) (   0.38,-125.01)  357.66                80
 09/14/2019   10:08:17   (   0.34,-128.14) (   0.83,-130.27)  243.44                80
 09/15/2019   09:46:53   (   0.35,-128.11) (  -0.20,-125.74)  270.28                80
 09/16/2019   22:08:49   (  -0.34,-128.04) (  -0.99,-131.04)  342.08                80
 09/17/2019   21:52:43   (  -0.34,-128.01) (  -0.02,-126.50)  171.78                80
 09/19/2019   10:14:32   (   0.33,-128.00) (   1.17,-131.77)  429.60                80
 09/20/2019   09:53:06   (   0.34,-127.97) (   0.20,-127.23)   83.42                80
 09/22/2019   21:56:18   (  -0.32,-127.84) (  -0.35,-128.01)   18.49                80